DTC Troubleshooting

DTC TROUBLESHOOTING TABLE

Step	Action	YES	NO
1	Vehicle speed signal check Check DTC in ECM, ABS hydraulic unit / control module and electronic stability program control module referring to DTC CHECK, DTC CHECK AND DTC CHECK . Is there DTC P0500: Vehicle speed sensor (VSS) malfunction in ECM and/or DTC C1021, C1022, C1025, C1026, C1031, C1032, C1035 and/or C1036 in ABS hydraulic unit / control module and electronic stability program control module?	Go to applicable DTC diagnosis flow.	Go to Step 2.
2	Was "A/T System Check" performed?	Go to Step 3.	Go to A/T SYSTEM CHECK .
3	Do you have SUZUKI scan tool?	Go to Step 4.	Go to Step 5.
4	4L switch and its circuit check Connect SUZUKI scan tool to DLC with ignition switch OFF. Turn ignition switch ON. Select "DATA LIST" mode on scan tool. Check 4L/N switch signal (ON or OFF) on display when turning transfer position switch to each position. 4L/N switch specifications "4H" position: OFF "4L" position: ON Is OFF / ON displayed as described above?	Intermittent trouble or faulty TCM. Check for intermittent trouble by referring to INTERMITTENT AND POOR CONNECTION INSPECTION . If OK, substitute a known-good TCM and recheck.	Go to Step 6.
5	4L/N switch and its circuit check Turn ignition switch ON. Check terminal voltage "E93-4" of TCM connector connected when turning transfer position switch to each position. 4L/N switch specifications "4H" position: 10 - 14 V "4L" position: 0 - 1 V If voltage as specified?	Intermittent trouble or faulty TCM. Check for intermittent trouble by referring to INTERMITTENT AND POOR CONNECTION INSPECTION . If OK, substitute a known-good TCM and recheck.	Go to Step 6.
6	4L/N switch check Check 4L/N switch for operation by referring to TRANSFER ASSEMBLY INSPECTION: MOTOR-SHIFT TYPE (TRANSFER WITH SHIFT ACTUATOR) . Is check result satisfactory?	4L/N switch circuit open. If wire and connections are OK, substitute a known good TCM and recheck.	Replace 4L/N switch.